Rock and coal drilling machine.



No. 830,036. PATENTED SEPT. 4,1906.

4 N. ZOMBR ROCK AND GOAL DRILLING MACHINE.

APPLICATION FILED APR-21,1906.

2 SHEETS-SHEET 1.

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. carryin shaft provided with a NIOHOLAUS ZOMER, OF \VlLKES-BARRE, PENNSYLVANIA.

ROCK AND COAL DRILLING MACHINE.

Specification of Letters Patent.

Patented Sept. 4, 1906.

Application filed April 21, 1906. Serial No. 318.038.

machines and it more particularly relates to portable rock and coal drilling machines of the rotary-drill type.

Generically my invention includes a drilldrill-receiving portion, a crank-arm loosely mounted on said shaft, said crank-arm having a bearing por tion to receive a stub-shaft which passes therethrough and carries a pinion at each end. The drill-shaft is mounted in a bearing aperture in one end of a handle member, which handle member is formed with a fixed gear concentric with the drill-axis. The drill-shaft also carries an internally-toothed rim-gear which meshes with one of the pinions on the crank-arm, while the other pinion on the crank-arm meshes with the fixed gear on the handle member.

In its more detail nature my invention comprises certain construction, combination, and arrangement of parts, all of which will be first described in detail and then be specifically pointed out in the appended claims, reference being had to the accompanying drawings, in which Figure 1 is a perspective view of my inven tion applied for use. Fig. 2 is a front elevation thereof. Fig. 3 isa vertical longitudinal section on the line 3 3 of Fig. 2. Fig. 1 is a detail perspective view of the handle member and the fixed gear. Fig. 5 is a detail perspective view of the crank-arm and the gear members carried thereby. Fig. 6 is a detail perspective view of the internal toothed rimgear.

Referring now to the accompanying drawings, in which like letters and numerals indicate like parts in all of the figures, 1 designates the drillcarrying shaft, provided at one end with a drill-receiving aperture or chuck portion 1*, into which the drill 10 is adapted to be secured by a set-screw 3 in the aperture 1 of the shaft 1. The shaft 1 passes through an aperture in the bearing member 2 of an arm or handle member 2, which is provided with a knob portion 2 at the end opposite the bearing portion 2 to form a operating the drill.

guard for the hand of the operator. The end 1 of the shaft 1 opposite the drill-carrying end is squared in cross-section to receive the hub portion 3 of the rim-gear 3, which is secured on the squared portion 1 of the shaft 1 by a key or spline 3 or otherwise, as may be found convenient.

Fixedly secured to dle member 2 is a gear ripheral gear-teeth 4 and a bearing portion 1 merging with the bearing member 2 of the arm 2 and provided with a central bore 1 to permit passage of the shaft 1. Mountedbetween the gear 4. and the squared portion 1 of the shaft 1 is a crank-arm 5, whose bearing end 5 is provided with an aperture to fit on the shaft 1 between the gear 1 and the squared portion 1, as before stated. The arm 5 is provided with a second bearing member 5 at a suitable distance from the bearing member 5", in which a stub-shaft 6 is rotat ably mounted, and the shaft 6 carries on each side of the arm 5 pinions 7 and 8, the pinion 8 meshing with the gear 4, as shown, while the pinion 7 meshes with the internal gear-teeth 3 of the wheel 3. The gear 3 is in the nature of an internahtoothed rim-gear whose rim portion 3 has the gear-teeth 3 as before stated. To hold the shaft 1 and the arm 5 in position, I provide a collar 11 on the shaft 1, which abuts the bearing portion 2 of the arm 2, asshown, and prevents axial movement of the shaft 1. The arm 5 at its upper end is provided with a suitable handle portion 9, by means of which the machine can be operated.

So far as described the complete construction and general arrangement of parts of my invention will be readily understood by those skilled in the art to which the invention appertains, and the manne'rlin which my invention operates can be best explained as follows: The operator grasps the handle 2, as shown in Fig. 1, with one hand and holds the drill 10 against the work. He then grasps the crankhandle 9 and turns the crank, as will be readily understood. by reference to the drawings. As the gear 1 is relatively stationary and the gear 3 on the shaft 1, as the crank-arm 5 is turned by the operator the gear 8 will ride around the periphery of the gear 4, and thereby impart motion to the shaft 6 which in turn rotates the gear 7, and as the gear 7 is in mesh with the internal gear 3 it will ride around the gear 3 and impart motion thereto, thus turning the drill-carrying shaft 1 and The desired feed of the or formed with the han- 4, provided with pedrill to the work may be given by the operator pressing the drill against the work through the medium of the handle 2.

In practice the relative arrangement of the gears may be such that the drill will rotate at a slower speed than the movement of the crank, so that greater leverage may be obtained. When lny drill is used as a stationary drill, the support 12 and the operating engine with its piston 20 may be mounted on any suitable device arranged to feed the whole mechanism forward to feed the drill, as such mechanism per se forms no part of my present invention.

From the foregoing description, taken in connection with the accompanying drawings, it is thought that the complete construction,

operation, and many advantages of my invention will be readily understood by those skilled in the art to which it appertains, and I desire to say that many slight changes in the detailed construction, operation, and arrangement of parts can be made Without departing from the invention or the scope of the appended claims. What I claim is- I 1. In a rock-drill of the class described, the combination-with a handle having a bearing member, of a drill-carrying shaft rotatably mounted in said bearing member, an internal toothed gear carried by said drill-shaft, a l fixedly-held gear secured to said handle, a crank-arm having a bearing portion mounted on said drill-carrying shaft and having a supplemental bearing portion, a stub-shaft mounted in said supplemental bearing member, pinions carried by said stub-shaft, one of which meshes withthe fixedly-held gear and l the other meshes With the internal toothed gear, substantially as shown and described.

2. An apparatus of the class described, I l

comprising a handle member having a bearing portion, a gear fixedly secured to said han dle at the bearing'portion thereof, a drill-carrying shaft rotatably mounted in said bearing portion and passing through said gear, said drill-carrying shaft having a squared portion, an internal toothed gear provided with a squared aperture toreceive said squared portion of the drill-carrying shaft, a crank-arm loosely mounted on said drillcar rying shaft, and connections between said fixed gear said crank-arm and said internal toothed gear, substantially as shown and described.

' 3. A drill of the class described, compris ing in combination with a handle member having a bearing portion, of a fixed gear carried by the handle member, a drill-carrying shaft rotatably mounted in said handle-bearing portion and passing through said fixed gear, concentrically therewith, said drillshaft having a drill-receiving portion, and means for securingthe drill in said drill-receiving portion, an internal toothed gear car ried by said drill-carrying shaft to turn therewith, a crank-arm loosely mounted on said drill-carrying shaft, between said fixed gear gear and gear conand said internal toothed nections, carried by the crank-arm, between the fixed gear and the internal toothed gear, substantially as shown and described.

4. A drill of the class described, compris ing in combination with a handle member having a bearing portion, and a fixed gear secured thereto, of a drill-carrying shaft rotatably mounted in said bearing portion, an internal toothed gear carried by said drill-carrying shaft and rotatable therewith, and said fixed gear having external gear-teeth, a crank-arm loosely mounted on said drill-carrying shaft between the fixed gear and the internally-toothed gear, said crank-arm having a supplemental bearing portion, a shaft rotatably mounted in said supplemental bearing portion and projecting through the same, pinions fixedly secured to said last named shaft on each side of the crank-arm, one of said pinions meshing with said internal gear-teeth and the other pinion meshing with said fixed gear, and means for holding the drill-carrying shaft from axial movement, in its bearing substantially as shown and described.

NICHOLAUS ZOMER. Witnesses:

A. E. DIETERIOII, MAY E. IMMIoH. I 

